Descartes | Vertical Scaling of Raster DEM when importing into a STM

How do I keep Descartes from vertically scaling a raster DEM when creating a STM?

When importing raster DEMs that are in imperial units, it scales the pixel values using the SI to Imperial unit conversion factor (meters to feet = x3.2808).

So I end up with STMs with exaggerated elevations.  How do I keep Descartes from applying this conversion factor vertically?